I've had that countless times on Halo: Custom Edition. Despite being old Halo CE still has a dedicated modding community and thriving online userbase on PC, beyond that of Halo 2 on Xbox, even (before support was withdrawn from Halo 2, obviously). And so when I've played on there I've often ended up stumbling into games that claim to be RP or Stunt servers only. So when I've expressed my dispproval and tried to play the actual game, I've been threatened with kicks and bans from the server. All for trying to play the game properly.
I don't really see what the big deal is with RP or Stunt servers. I guess if you're making a machinima, then fine, but anything else is just stupid and doesn't make sense to me. I fire up Halo if I want to play an online shooter, and go out and get a few headshots or steal some flags. I don't play it just for people to spam me when I enter a server, saying "Go Blue! Go Blue! This is an RP game!". That kills the whole enjoyment for me...